In a statement responding to criticism, the diocese said it was keen to be part of ongoing conversations about whether those employed by the Church to lead any aspects of its work need to be Christians.
Explaining the decision, it said: "After reviewing legal guidance the view was that this role would not fall as an exception to the overriding principle that it is unlawful for employers to discriminate on the grounds of an employee's religion or belief, or lack of it."
Although applicants aren't required to be Christians, they will need to have "a desire to serve the church in the Diocese of Truro and be passionate about enabling spiritual/numerical growth".
The strategic programme manager will be responsible for "the strategic leadership of the Transforming Mission programme".
Blogger Archbishop Cranmer questioned the decision, stating: "How may one be a mission leader without hearing the promptings of the Holy Spirit and abiding in the Word of God?"
The Diocese of Truro responded by thanking the blog for giving publicity to its job post and said he will be pleased to know that all the other roles in relation to this project - the Mission and Ministry roles - will require the applicant to be a practising Christian.